diff --git a/CHANGELOG b/CHANGELOG
index 4fefbf0d6..7d2a3c609 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,6 +1,9 @@
 ChangeLog :
 ===========
 
+2023/12/05 : 3.0-dev0
+    - exact copy of 2.9.0
+
 2023/12/05 : 2.9.0
     - DOC: config: add missing colon to "bytes_out" sample fetch keyword (2)
     - BUG/MINOR: cfgparse-listen: fix warning being reported as an alert
diff --git a/VERSION b/VERSION
index c8e38b614..dbf52fd7f 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.9.0
+3.0-dev0
diff --git a/doc/configuration.txt b/doc/configuration.txt
index 863661097..cada9f1aa 100644
--- a/doc/configuration.txt
+++ b/doc/configuration.txt
@@ -2,7 +2,7 @@
                                 HAProxy
                           Configuration Manual
                          ----------------------
-                              version 2.9
+                              version 3.0
                               2023/12/05
 
 
diff --git a/doc/intro.txt b/doc/intro.txt
index f4133a107..c3f6cdae5 100644
--- a/doc/intro.txt
+++ b/doc/intro.txt
@@ -1,7 +1,7 @@
                              -----------------------
                               HAProxy Starter Guide
                              -----------------------
-                                   version 2.9
+                                   version 3.0
 
 
 This document is an introduction to HAProxy for all those who don't know it, as
diff --git a/doc/management.txt b/doc/management.txt
index b1789db77..85aa47f56 100644
--- a/doc/management.txt
+++ b/doc/management.txt
@@ -1,7 +1,7 @@
                              ------------------------
                              HAProxy Management Guide
                              ------------------------
-                                   version 2.9
+                                   version 3.0
 
 
 This document describes how to start, stop, manage, and troubleshoot HAProxy,
diff --git a/include/haproxy/version.h b/include/haproxy/version.h
index 9e349b721..11023e600 100644
--- a/include/haproxy/version.h
+++ b/include/haproxy/version.h
@@ -33,7 +33,7 @@
 #ifdef  CONFIG_PRODUCT_BRANCH
 #define PRODUCT_BRANCH    CONFIG_PRODUCT_BRANCH
 #else
-#define PRODUCT_BRANCH   "2.9"
+#define PRODUCT_BRANCH   "3.0"
 #endif
 
 #ifdef  CONFIG_PRODUCT_STATUS